AutoCodes – Buick – B0514 Buick

B0514 Buick Code - Output Air Temperature Sensor 4 Circuit

Quick Answer

Air temperature sensors allow the Heating, Ventilation, and Air Conditioning (HVAC) Control Module to monitor the temperature of the discharge air in the HVAC ducts. Common causes include Faulty Output Air Temperature Sensor 4, Output Air Temperature Sensor 4 harness is open or shorted, Output Air Temperature Sensor 4 circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B0514 Buick indicates Output Air Temperature Sensor 4 Circuit.
Common causes: Common causes include Faulty Output Air Temperature Sensor 4, Output Air Temperature Sensor 4 harness is open or shorted, Output Air Temperature Sensor 4 circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 1,287

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 11, 2021

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B0514 Buick Description

Air temperature sensors allow the Heating, Ventilation, and Air Conditioning (HVAC) Control Module to monitor the temperature of the discharge air in the HVAC ducts. The module applies 5 volts to internal input resistors that are connected to the signal circuits of the air temperature sensors. The module provides ground to the air temperature sensors through the low reference circuit. The HVAC control module monitors the voltage drops across the air temperature sensors and uses the inputs for automatic control calculations. When the duct air temperatures are cold, the resistances of the sensors are high and the voltage signals are high. When the duct air temperatures are hot, the resistances of the sensors are low and the voltage signals are low. The HVAC control module converts the voltage values to count values where 1 volt is approximately equal to 51 counts.

OBDII Code B0514 Buick - Output Air Temperature Sensor 4 Circuit - AutoCodes.com — B0514 Buick Code - Output Air Temperature Sensor 4 Circuit

What does this mean?

What are the Possible Causes of the DTC B0514 Buick?

Faulty Output Air Temperature Sensor 4
Output Air Temperature Sensor 4 harness is open or shorted
Output Air Temperature Sensor 4 circuit poor electrical connection
Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module

How to Fix the DTC B0514 Buick?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

B0514 05: Output Air Temperature Sensor 4 Circuit Short to Battery or Open
B0514 02: Output Air Temperature Sensor 4 Circuit Short to Ground

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0514 Buick code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B0514 Buick Code

1. What does the OBDII code B0514 mean on a Buick?

The B0514 code indicates an issue with the Output Air Temperature Sensor 4 Circuit, which monitors the temperature of air in a specific system, such as the HVAC.

2. What are the common symptoms of the B0514 code?

Symptoms may include incorrect cabin temperature readings, irregular HVAC performance, or the climate control system not functioning as expected.

3. What causes the B0514 code to appear?

Potential causes include a faulty Output Air Temperature Sensor, damaged wiring or connectors, or a malfunctioning HVAC control module.

4. Can I drive my Buick with the B0514 code?

Yes, you can typically drive the vehicle, but the HVAC system may not work properly, and comfort could be affected.

5. How is the B0514 code diagnosed?

A technician will use a scan tool to verify the code, inspect the sensor and its wiring, and check for voltage or resistance inconsistencies in the circuit.

6. How do I fix the B0514 code on my Buick?

Repairs may involve replacing the faulty sensor, repairing damaged wiring or connectors, or reprogramming or replacing the HVAC control module if needed.

7. How much does it cost to repair the B0514 code?

Repair costs can vary but typically range from $100 to $300, depending on whether the sensor or wiring needs replacement.

8. Can a dead battery trigger the B0514 code on a Buick?

A dead or weak battery is unlikely to directly cause this code but could lead to electrical issues that indirectly affect the sensor circuit.

9. Will clearing the B0514 code fix the issue permanently?

Clearing the code will temporarily remove it, but the underlying issue must be repaired to prevent it from returning.

10. What tools are needed to troubleshoot the B0514 code?

Basic tools include a scan tool to retrieve and clear codes, a multimeter to test the sensor and circuit, and potentially wiring diagrams for the HVAC system.